Description
The CIR-D voltage or current amplifiers have been desig- ned to enable the user to adapt non-amplified strain gauge transducers (load cells, pressure transducers) to acquisi- tion systems, PLC, instrumentation with high level inputs. These amplifiers have galvanic isolation between the supply voltage and the transducer to increase the rejection of noise generated by the power supply itself. The availa- bility of the output in current enables the signal to be car- ried over long distances or used in intelligent automation systems.
TECHNICAL DATA OF CIR-D
| Linearity error | < 0.05%FSO |
| Galvanic isolation between Vsupply and Amplifier | > 500 Vdc |
| Primary sensor sensitivity | 1 or 2mV/V |
| Primary sensor resistance | 350Ω |
| Output load resistance | ≤ 400Ω |
| Supply voltage | 20…30Vdc |
| Current drain with sensor connected | < 70mA |
| Supply voltage to transducer | 10Vdc |
| Output signal at zero | 0mA |
| Zero signal accuracy | ± 0,1%FSO |
| Zero adjustment | ± 10%FSO |
| Full scale output | 20mA |
| Full scale output accuracy | ± 0,1%FSO |
| Span adjustment | ± 10%FSO |
| Inverse polarity protection | Yes |
| Response time (10…90%FSO) | 8ms |
| Output noise (RMS 10…400Hz) | 0.05%FSO |
| Temperature range: Compensated Working Storage | 0…70°C -10…+80°C -50…+100°C |
| Typical thermal drift of zero | ± 0.01%FSO/°C |
| Typical thermal drift of span | ± 0.01%FSO/°C |
| Case material | Anodised aluminium Nylon 66 CF40 |
| Protection degree | IP65 – EN60529 |
FSO: Full Scale Output (signal at full span).
The electrical characteristics are those measured with Vsupply = 24V – RL = 400 Ohm – Ambient temperature. = 25°C
